Ground Reinforcement Continues to Find New England Applications
Ten months after being
offered as an intermediate foundation support alternative to New England
in 2002, Geopier rammed aggregate piers were successfully installed at
project locations in Massachusetts, Connecticut and Maine. As New England
Design Associate, Design/Build Geotechnical working with Helical Drilling
, Inc., Braintree MA and the Geopier Foundation Company, developed cost
effective designs for each project and coordinated the successful installation
and field verification testing necessary to ensure the successful application
of this unique ground improvement technique.
Presently over a dozen projects have been completed in New England including
projects in NH and RI. These projects include a 1-story restaurant, two
gasoline service stations, a 1-story Welcome Center Facility, a 2 to 3-story
residence facility, and portions of new water and sewer lines. The projects
were completed in a wide variety of difficult soils including soft sensitive
clay, peat and organic silt deposits, and uncontrolled and rubble fill
deposits demonstrating the challenging subsurface conditions that may
be addressed with Geopier Rammed Aggregate Piers. With the additions of
these New England projects, more than 700 Geopier projects and over 200,000
Geopier elements have been installed across the US in the past 15 years.
Specific information on these recently completed projects is available
at the Geopier page of this site or by contacting Jim Wheeler at
Additional information about the Geopier soil reinforcement system is
available at www.geopiers.com and
information about the capabilities of Helical Drilling, Inc. may be obtained
Presently, numerous other potential Geopier project applications are being
evaluated throughout New England as D/BG continues its mission of providing
timely, cost-effective foundation solutions to owners, engineers and contractors.
Temporary casing permits
Geopier installation below groundwater and through soft organic deposits
to support building foundation and slab-on-grade at Service Station, Pittsfield,
& Bates Relief Sewer Project Featured in Tunnels & Tunneling
with Kyle Camper (Hayward Baker Inc.) and Nancy Thomson (Brierley Associates,
LLC), D/BG principle, James Wheeler co-authored an article for the May
2003 issue of T&T International magazine entitled "Value
Engineered Shafts in St. Louis". Focusing on the major value
engineering efforts made on the project, the article also describes the
design, construction and instrumented performance of the 32 and 36-ft.
diameter jet-grout supported construction shafts. Designed as self supporting
compression rings, these shafts provided positive control of ground movements
and groundwater flow at an irregular, karstic limestone/soil interface
and provided a cost effective means for rapidly excavating the shafts
to permit TBM tunneling operations. Contact Jim Wheeler at JWheeler@DBGeotech.com
for additional information or visit www.tunnelsonline.info/index.asp
Technical paper presented at North American Tunneling (NAT 2004) conference
Wheeler, Principal, presented a paper coauthored with Nancy Thomson (Brierley
Associates) entitled "Value Environmental Design facilitates Ground
& Bates Sewer Construction" presented at the NAT 2004 conference
in Atlanta, GA in May 2004. The paper describes the design-build development
and construction of a jet grout supported temporary access shaft through
saturated sands to provide access to a 75 year-old 90-in. conduit serving
as the primary water supply for the city of Providence, RI. Contact Jim
Wheeler at JWheeler@DBGeotech.com
for further information about this paper.
Invited as Guest Speaker at Geotechnical Seminar
response to the request of the Connecticut Society of Civil Engineers
(CSCE) and the Deep Foundation Institute (DFI) D/BG Principal, Jim Wheeler
has been invited to speak at the 5th CSCE/DFI Geotechnical Seminar in
Berlin, CT on September 19, 2003. Mr. Wheeler's presentation, entitled
"Geopier Elements for Foundation Support in Poor Soils", will
describe the disign principles for rammed aggregate piers and illustrate
the use of this intermediate foundation system in a wide variety of ground
conditions and technical applications. Other topics to be presented at
the seminar include Soil and Rock Anchors, EPS Embankment Construction,
Pile Driving and Pile Load Testing Applications, and Soil Improvement
Methods. Attended by over 100 people last year, this 5th local seminar
promises to provide valuable information on local geotechnical and foundation
construction practice. Information about the DFI may be found at www.dfi.org.
Keep an eye on this web site and the CSCE web site, www.csce.org
for the upcoming seminar announcement.
Boston's Central Artery/Tunnel Project, C011A1 Acknowledged by ACEC
January 23, 2002
BOSTON, MA - The Central Artery Tunnel (CA/T) Project, Section C11A1,
I-93 Northbound Tunnel received the 2002 Grand Conceptor Award from the
American Council of Engineering Companies of Massachusetts (ACEC/MA).
The team of STV Incorporated/Parsons Transportaion Group (J/V) in association
with Haley & Aldrich provided final design services for the deepest
and one of the most complicated portions of the Central Artery. While
working with Haley & Aldrich, Design/Build Geotechnical Principal,
James R. Wheeler served for six years as the lead geotechnical engineer
of record responsible for geotechnical and tunnel design services under
subcontract to the Joint Venture. For additional information about this
project, see Other Selected Project Descriptions at www.dbgeotech.com/projects.htm
or refer to ACEC of Massachusetts at www.engineers.org/acec-ma/eea/.
RELATED PROJECT APPLICATIONS
Loading blast holes
to remove bedrock for the 32 ft. diameter tunnel access shaft with the
upper 65 ft. of soil supported by 4-ft. thick wall of unreinforced jet-grouted
soil (Soilcrete) constructed with a series of interconnected 3-1/2 ft.
diamter full and half grout columns. Grand & Bates Relief Sewer Tunnel,
St. Louis. MO.
installed through granite block foundations and adjacent to active rail
traffic provide additional vertical and lateral foundation support as
part of the upgrade completed on the historic Canton Viaduct, Canton,
placed immediately adjacent to a jet grout underpinned high-rise building
to provide a new below-grade foundation footprint that reaches completely
to the property line, Minneapolis, MN.
stabilization to limit continued embankment settlement is completed using
lime injection completed from rail-mounted equipment, Rutland, VT.
A storage tank foundation
is supported on a grid Vibro concrete columns (VCC) installed through
soft alluvial soils, Philadelphia, PA.
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